int
main(int argc, char *argv[])
{
glfwInit();
glfwWindowHint(GLFW_VISIBLE, GL_FALSE);
glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 2);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
window = glfwCreateWindow(300, 300, argv[0], NULL, NULL);
if (!window) {
return EXIT_SKIP;
}
glfwMakeContextCurrent(window);
if (!gladLoadGLES2Loader((GLADloadproc) glfwGetProcAddress)) {
return EXIT_FAILURE;
}
assert(GLAD_GL_ES_VERSION_2_0);
assert(GLAD_GL_EXT_debug_marker == glfwExtensionSupported("GL_EXT_debug_marker"));
init();
reshape();
draw();
glfwDestroyWindow(window);
glfwTerminate();
return 0;
}
/** makes sure that we can use all the extensions we need for this app */
bool checkExtensions()
{
/**
the extesnsions that are going to be need are for bindless vbo's which are:
*/
std::vector<std::string> extensions {
// Allows the use of the gpu to have direct accesss to client memory
// bypass gpu memory managent,
// have persistent mappings to buffer objects
"GL_ARB_buffer_storage" // https://www.opengl.org/registry/specs/ARB/buffer_storage.txt
,"GL_ARB_map_buffer_range" // https://www.opengl.org/registry/specs/ARB/map_buffer_range.txt
,"GL_ARB_sync" // https://www.opengl.org/registry/specs/ARB/sync.txt
// queries the gpu for time stamps
,"GL_ARB_timer_query" // http://www.opengl.org/registry/specs/ARB/timer_query.txt
// debug printing support
,"GL_ARB_debug_output" // http://www.opengl.org/registry/specs/ARB/debug_output.txt
};
bool found_lacking = false;
for (auto extension : extensions) {
if (glfwExtensionSupported(extension.c_str()) == GL_FALSE){
std::cerr << extension << " - is required and not supported on this machine." << std::endl;
found_lacking = true;
}
}
return !found_lacking;
}
static inline jboolean wrapped_Java_com_badlogic_jglfw_Glfw_glfwExtensionSupported
(JNIEnv* env, jclass clazz, jstring obj_extension, char* extension) {
//@line:922
return glfwExtensionSupported(extension) == GL_TRUE;
}
bool initExtensions() {
#define LOAD_EXTENSION_FUNCTION(TYPE, FN) FN = (TYPE)glfwGetProcAddress(#FN);
bool bRet = false;
do {
// char* p = (char*) glGetString(GL_EXTENSIONS);
// printf(p);
/* Supports frame buffer? */
if (glfwExtensionSupported("GL_EXT_framebuffer_object") != GL_FALSE)
{
/* Loads frame buffer extension functions */
LOAD_EXTENSION_FUNCTION(PFNGLGENERATEMIPMAPEXTPROC,
glGenerateMipmapEXT);
LOAD_EXTENSION_FUNCTION(PFNGLGENFRAMEBUFFERSEXTPROC,
glGenFramebuffersEXT);
LOAD_EXTENSION_FUNCTION(PFNGLDELETEFRAMEBUFFERSEXTPROC,
glDeleteFramebuffersEXT);
LOAD_EXTENSION_FUNCTION(PFNGLBINDFRAMEBUFFEREXTPROC,
glBindFramebufferEXT);
LOAD_EXTENSION_FUNCTION(PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC,
glCheckFramebufferStatusEXT);
LOAD_EXTENSION_FUNCTION(PFNGLFRAMEBUFFERTEXTURE2DEXTPROC,
glFramebufferTexture2DEXT);
} else {
break;
}
if (glfwExtensionSupported("GL_ARB_vertex_buffer_object") != GL_FALSE) {
LOAD_EXTENSION_FUNCTION(PFNGLGENBUFFERSARBPROC, glGenBuffersARB);
LOAD_EXTENSION_FUNCTION(PFNGLBINDBUFFERARBPROC, glBindBufferARB);
LOAD_EXTENSION_FUNCTION(PFNGLBUFFERDATAARBPROC, glBufferDataARB);
LOAD_EXTENSION_FUNCTION(PFNGLBUFFERSUBDATAARBPROC,
glBufferSubDataARB);
LOAD_EXTENSION_FUNCTION(PFNGLDELETEBUFFERSARBPROC,
glDeleteBuffersARB);
} else {
break;
}
bRet = true;
} while (0);
return bRet;
}
/*
* loadExtensions() - Load OpenGL extensions for anything above OpenGL
* version 1.1. (This is a requirement only on Windows, so on other
* platforms, this function just checks for the required extensions.)
*/
void loadExtensions() {
//These extension strings indicate that the OpenGL Shading Language
// and GLSL shader objects are supported.
if(!glfwExtensionSupported("GL_ARB_shading_language_100"))
{
printError("GL init error", "GL_ARB_shading_language_100 extension was not found");
return;
}
if(!glfwExtensionSupported("GL_ARB_shader_objects"))
{
printError("GL init error", "GL_ARB_shader_objects extension was not found");
return;
}
else
{
#ifdef __WIN32__
glCreateProgram = (PFNGLCREATEPROGRAMPROC)glfwGetProcAddress("glCreateProgram");
glDeleteProgram = (PFNGLDELETEPROGRAMPROC)glfwGetProcAddress("glDeleteProgram");
glUseProgram = (PFNGLUSEPROGRAMPROC)glfwGetProcAddress("glUseProgram");
glCreateShader = (PFNGLCREATESHADERPROC)glfwGetProcAddress("glCreateShader");
glDeleteShader = (PFNGLDELETESHADERPROC)glfwGetProcAddress("glDeleteShader");
glShaderSource = (PFNGLSHADERSOURCEPROC)glfwGetProcAddress("glShaderSource");
glCompileShader = (PFNGLCOMPILESHADERPROC)glfwGetProcAddress("glCompileShader");
glGetShaderiv = (PFNGLGETSHADERIVPROC)glfwGetProcAddress("glGetShaderiv");
glGetShaderInfoLog = (PFNGLGETSHADERINFOLOGPROC)glfwGetProcAddress("glGetShaderInfoLog");
glAttachShader = (PFNGLATTACHSHADERPROC)glfwGetProcAddress("glAttachShader");
glLinkProgram = (PFNGLLINKPROGRAMPROC)glfwGetProcAddress("glLinkProgram");
glGetProgramiv = (PFNGLGETPROGRAMIVPROC)glfwGetProcAddress("glGetProgramiv");
glGetProgramInfoLog = (PFNGLGETPROGRAMINFOLOGPROC)glfwGetProcAddress("glGetProgramInfoLog");
glGetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC)glfwGetProcAddress("glGetUniformLocation");
glUniform1fv = (PFNGLUNIFORM1FVPROC)glfwGetProcAddress("glUniform1fv");
if( !glCreateProgram || !glDeleteProgram || !glUseProgram ||
!glCreateShader || !glDeleteShader || !glShaderSource || !glCompileShader ||
!glGetShaderiv || !glGetShaderInfoLog || !glAttachShader || !glLinkProgram ||
!glGetProgramiv || !glGetProgramInfoLog || !glGetUniformLocation ||
!glUniform1fv )
{
printError("GL init error", "One or more required OpenGL functions were not found");
return;
}
#endif
}
}
/*
* loadExtensions - Load the required OpenGL extensions.
*/
void loadExtensions() {
// These extension strings indicate that the OpenGL Shading Language,
// GLSL shader objects and floating-point textures are supported.
if(!glfwExtensionSupported("GL_ARB_shading_language_100"))
{
printError("GL init error", "GL_ARB_shading_language_100 extension was not found");
return;
}
if(!glfwExtensionSupported("GL_ARB_shader_objects"))
{
printError("GL init error", "GL_ARB_shader_objects extension was not found");
return;
}
// else
#ifdef __WIN32__
glActiveTextureARB = (PFNGLACTIVETEXTUREARBPROC)glfwGetProcAddress("glActiveTextureARB");
glCreateProgramObjectARB = (PFNGLCREATEPROGRAMOBJECTARBPROC)glfwGetProcAddress("glCreateProgramObjectARB");
glDeleteObjectARB = (PFNGLDELETEOBJECTARBPROC)glfwGetProcAddress("glDeleteObjectARB");
glUseProgramObjectARB = (PFNGLUSEPROGRAMOBJECTARBPROC)glfwGetProcAddress("glUseProgramObjectARB");
glCreateShaderObjectARB = (PFNGLCREATESHADEROBJECTARBPROC)glfwGetProcAddress("glCreateShaderObjectARB");
glShaderSourceARB = (PFNGLSHADERSOURCEARBPROC)glfwGetProcAddress("glShaderSourceARB");
glCompileShaderARB = (PFNGLCOMPILESHADERARBPROC)glfwGetProcAddress("glCompileShaderARB");
glGetObjectParameterivARB = (PFNGLGETOBJECTPARAMETERIVARBPROC)glfwGetProcAddress("glGetObjectParameterivARB");
glAttachObjectARB = (PFNGLATTACHOBJECTARBPROC)glfwGetProcAddress("glAttachObjectARB");
glGetInfoLogARB = (PFNGLGETINFOLOGARBPROC)glfwGetProcAddress("glGetInfoLogARB");
glLinkProgramARB = (PFNGLLINKPROGRAMARBPROC)glfwGetProcAddress("glLinkProgramARB");
glGetUniformLocationARB = (PFNGLGETUNIFORMLOCATIONARBPROC)glfwGetProcAddress("glGetUniformLocationARB");
glUniform4fARB = (PFNGLUNIFORM4FARBPROC)glfwGetProcAddress("glUniform4fARB");
glUniform1fARB = (PFNGLUNIFORM1FARBPROC)glfwGetProcAddress("glUniform1fARB");
glUniform1iARB = (PFNGLUNIFORM1IARBPROC)glfwGetProcAddress("glUniform1iARB");
if( !glActiveTextureARB ||
!glCreateProgramObjectARB || !glDeleteObjectARB || !glUseProgramObjectARB ||
!glCreateShaderObjectARB || !glCreateShaderObjectARB || !glCompileShaderARB ||
!glGetObjectParameterivARB || !glAttachObjectARB || !glGetInfoLogARB ||
!glLinkProgramARB || !glGetUniformLocationARB || !glUniform4fARB ||
!glUniform1fARB || !glUniform1iARB )
{
printError("GL init error", "One or more GL_ARB_shader_objects functions were not found");
return;
}
#endif
}
void init_msaa()
{
if (!glfwExtensionSupported("GL_ARB_multisample"))
{
printf("GL_ARB_multisample extension not supported\n");
glfwTerminate();
exit(EXIT_FAILURE);
}
}
int flextInit(void)
{
int major = glfwGetWindowParam(GLFW_OPENGL_VERSION_MAJOR);
int minor = glfwGetWindowParam(GLFW_OPENGL_VERSION_MINOR);
flextLoadOpenGLFunctions();
/* --- Check for minimal version and profile --- */
if (major * 10 + minor < 20) {
fprintf(stderr, "Error: OpenGL version 2.0 not supported.\n");
fprintf(stderr, " Your version is %d.%d.\n", major, minor);
fprintf(stderr, " Try updating your graphics driver.\n");
return GL_FALSE;
}
/* --- Check for extensions --- */
if (!glfwExtensionSupported("GL_EXT_framebuffer_object")) {
fprintf(stderr, "Error: OpenGL extension EXT_framebuffer_object not supported.\n");
fprintf(stderr, " Try updating your graphics driver.\n");
return GL_FALSE;
}
if (glfwExtensionSupported("GL_ARB_geometry_shader4")) {
FLEXT_ARB_geometry_shader4 = GL_TRUE;
}
if (glfwExtensionSupported("GL_EXT_transform_feedback")) {
FLEXT_EXT_transform_feedback = GL_TRUE;
}
if (glfwExtensionSupported("GL_EXT_texture_filter_anisotropic")) {
FLEXT_EXT_texture_filter_anisotropic = GL_TRUE;
}
return GL_TRUE;
}
int main(void)
{
int i, width, height;
GLFWwindow* window;
glfwSetErrorCallback(error_callback);
if (!glfwInit())
exit(EXIT_FAILURE);
glfwWindowHint(GLFW_VISIBLE, GL_FALSE);
window = glfwCreateWindow(640, 480, "Defaults", NULL, NULL);
if (!window)
{
glfwTerminate();
exit(EXIT_FAILURE);
}
glfwMakeContextCurrent(window);
glfwGetFramebufferSize(window, &width, &height);
printf("framebuffer size: %ix%i\n", width, height);
for (i = 0; glfw_attribs[i].name; i++)
{
printf("%s: %i\n",
glfw_attribs[i].name,
glfwGetWindowAttrib(window, glfw_attribs[i].attrib));
}
for (i = 0; gl_attribs[i].name; i++)
{
GLint value = 0;
if (gl_attribs[i].ext)
{
if (!glfwExtensionSupported(gl_attribs[i].ext))
continue;
}
glGetIntegerv(gl_attribs[i].attrib, &value);
printf("%s: %i\n", gl_attribs[i].name, value);
}
glfwDestroyWindow(window);
window = NULL;
glfwTerminate();
exit(EXIT_SUCCESS);
}
void initGPUTimer(struct GPUtimer* timer)
{
memset(timer, 0, sizeof(*timer));
timer->supported = glfwExtensionSupported("GL_ARB_timer_query");
if (timer->supported) {
#ifndef GL_ARB_timer_query
glGetQueryObjectui64v = (pfnGLGETQUERYOBJECTUI64V)glfwGetProcAddress("glGetQueryObjectui64v");
if (!glGetQueryObjectui64v) {
timer->supported = GL_FALSE;
return;
}
#endif
glGenQueries(GPU_QUERY_COUNT, timer->queries);
}
}
void Window::makeContextCurrent() {
glfwMakeContextCurrent(m_handle);
WindowData *wd = getWindowData(m_handle);
// init glaer
if (!wd->init_done) {
gecom::log("Window") << "GLAER initializing...";
//GLenum t_err = glGetError();
//gecom::log("Window") << "GLEW t_err: " << t_err;
if (!glaerInitCurrentContext()) {
gecom::log("Window").error() << "GLAER initialization failed:";
glfwTerminate();
std::abort();
}
// clear any GL errors from init
GLenum gl_err = glGetError();
while (gl_err) {
gecom::log("Window") << "GLAER initialization left GL error " << gl_err;
gl_err = glGetError();
}
//gecom::log("Window") << "GL Error: " << gluErrorString(gl_err);
gecom::log("Window") << "GL version string: " << glGetString(GL_VERSION);
gecom::log("Window").information(0) << "GLAER initialized";
wd->init_done = true;
// enable GL_ARB_debug_output if available
if (glfwExtensionSupported("GL_ARB_debug_output")) {
// this allows the error location to be determined from a stacktrace
glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS);
// set the callback
glDebugMessageCallback(callbackDebugGL, this);
glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, nullptr, true);
log("Window") << "GL debug callback installed";
} else {
log("Window") << "GL_ARB_debug_output not available";
}
}
}
int main(int argc, char** argv)
{
int ch, client, context, major, minor, revision, profile;
GLint redbits, greenbits, bluebits, alphabits, depthbits, stencilbits;
int list_extensions = GLFW_FALSE, list_layers = GLFW_FALSE;
GLenum error;
GLFWwindow* window;
enum { CLIENT, CONTEXT, BEHAVIOR, DEBUG, FORWARD, HELP, EXTENSIONS, LAYERS,
MAJOR, MINOR, PROFILE, ROBUSTNESS, VERSION,
REDBITS, GREENBITS, BLUEBITS, ALPHABITS, DEPTHBITS, STENCILBITS,
ACCUMREDBITS, ACCUMGREENBITS, ACCUMBLUEBITS, ACCUMALPHABITS,
AUXBUFFERS, SAMPLES, STEREO, SRGB, SINGLEBUFFER, NOERROR_SRSLY };
const struct option options[] =
{
{ "behavior", 1, NULL, BEHAVIOR },
{ "client-api", 1, NULL, CLIENT },
{ "context-api", 1, NULL, CONTEXT },
{ "debug", 0, NULL, DEBUG },
{ "forward", 0, NULL, FORWARD },
{ "help", 0, NULL, HELP },
{ "list-extensions", 0, NULL, EXTENSIONS },
{ "list-layers", 0, NULL, LAYERS },
{ "major", 1, NULL, MAJOR },
{ "minor", 1, NULL, MINOR },
{ "profile", 1, NULL, PROFILE },
{ "robustness", 1, NULL, ROBUSTNESS },
{ "version", 0, NULL, VERSION },
{ "red-bits", 1, NULL, REDBITS },
{ "green-bits", 1, NULL, GREENBITS },
{ "blue-bits", 1, NULL, BLUEBITS },
{ "alpha-bits", 1, NULL, ALPHABITS },
{ "depth-bits", 1, NULL, DEPTHBITS },
{ "stencil-bits", 1, NULL, STENCILBITS },
{ "accum-red-bits", 1, NULL, ACCUMREDBITS },
{ "accum-green-bits", 1, NULL, ACCUMGREENBITS },
{ "accum-blue-bits", 1, NULL, ACCUMBLUEBITS },
{ "accum-alpha-bits", 1, NULL, ACCUMALPHABITS },
{ "aux-buffers", 1, NULL, AUXBUFFERS },
{ "samples", 1, NULL, SAMPLES },
{ "stereo", 0, NULL, STEREO },
{ "srgb", 0, NULL, SRGB },
{ "singlebuffer", 0, NULL, SINGLEBUFFER },
{ "no-error", 0, NULL, NOERROR_SRSLY },
{ NULL, 0, NULL, 0 }
};
// Initialize GLFW and create window
if (!valid_version())
exit(EXIT_FAILURE);
glfwSetErrorCallback(error_callback);
if (!glfwInit())
exit(EXIT_FAILURE);
while ((ch = getopt_long(argc, argv, "a:b:dfhlm:n:p:s:v", options, NULL)) != -1)
{
switch (ch)
{
case 'a':
case CLIENT:
if (strcasecmp(optarg, API_NAME_OPENGL) == 0)
glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_API);
else if (strcasecmp(optarg, API_NAME_OPENGL_ES) == 0)
glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);
else
{
usage();
exit(EXIT_FAILURE);
}
break;
case 'b':
case BEHAVIOR:
if (strcasecmp(optarg, BEHAVIOR_NAME_NONE) == 0)
{
glfwWindowHint(GLFW_CONTEXT_RELEASE_BEHAVIOR,
GLFW_RELEASE_BEHAVIOR_NONE);
}
else if (strcasecmp(optarg, BEHAVIOR_NAME_FLUSH) == 0)
{
glfwWindowHint(GLFW_CONTEXT_RELEASE_BEHAVIOR,
GLFW_RELEASE_BEHAVIOR_FLUSH);
}
else
{
usage();
exit(EXIT_FAILURE);
}
break;
case 'c':
case CONTEXT:
if (strcasecmp(optarg, API_NAME_NATIVE) == 0)
glfwWindowHint(GLFW_CONTEXT_CREATION_API, GLFW_NATIVE_CONTEXT_API);
else if (strcasecmp(optarg, API_NAME_EGL) == 0)
glfwWindowHint(GLFW_CONTEXT_CREATION_API, GLFW_EGL_CONTEXT_API);
else
{
usage();
exit(EXIT_FAILURE);
}
break;
case 'd':
case DEBUG:
glfwWindowHint(GLFW_OPENGL_DEBUG_CONTEXT, GLFW_TRUE);
break;
case 'f':
case FORWARD:
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GLFW_TRUE);
break;
case 'h':
case HELP:
usage();
exit(EXIT_SUCCESS);
case 'l':
case EXTENSIONS:
list_extensions = GLFW_TRUE;
break;
case LAYERS:
list_layers = GLFW_TRUE;
break;
case 'm':
case MAJOR:
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, atoi(optarg));
break;
case 'n':
case MINOR:
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, atoi(optarg));
break;
case 'p':
case PROFILE:
if (strcasecmp(optarg, PROFILE_NAME_CORE) == 0)
{
glfwWindowHint(GLFW_OPENGL_PROFILE,
GLFW_OPENGL_CORE_PROFILE);
}
else if (strcasecmp(optarg, PROFILE_NAME_COMPAT) == 0)
{
glfwWindowHint(GLFW_OPENGL_PROFILE,
GLFW_OPENGL_COMPAT_PROFILE);
}
else
{
usage();
exit(EXIT_FAILURE);
}
break;
case 's':
case ROBUSTNESS:
if (strcasecmp(optarg, STRATEGY_NAME_NONE) == 0)
{
glfwWindowHint(GLFW_CONTEXT_ROBUSTNESS,
GLFW_NO_RESET_NOTIFICATION);
}
else if (strcasecmp(optarg, STRATEGY_NAME_LOSE) == 0)
{
glfwWindowHint(GLFW_CONTEXT_ROBUSTNESS,
GLFW_LOSE_CONTEXT_ON_RESET);
}
else
{
usage();
exit(EXIT_FAILURE);
}
break;
case 'v':
case VERSION:
print_version();
exit(EXIT_SUCCESS);
case REDBITS:
if (strcmp(optarg, "-") == 0)
glfwWindowHint(GLFW_RED_BITS, GLFW_DONT_CARE);
else
glfwWindowHint(GLFW_RED_BITS, atoi(optarg));
break;
case GREENBITS:
if (strcmp(optarg, "-") == 0)
glfwWindowHint(GLFW_GREEN_BITS, GLFW_DONT_CARE);
else
glfwWindowHint(GLFW_GREEN_BITS, atoi(optarg));
break;
case BLUEBITS:
if (strcmp(optarg, "-") == 0)
glfwWindowHint(GLFW_BLUE_BITS, GLFW_DONT_CARE);
else
glfwWindowHint(GLFW_BLUE_BITS, atoi(optarg));
break;
case ALPHABITS:
if (strcmp(optarg, "-") == 0)
glfwWindowHint(GLFW_ALPHA_BITS, GLFW_DONT_CARE);
else
glfwWindowHint(GLFW_ALPHA_BITS, atoi(optarg));
break;
case DEPTHBITS:
if (strcmp(optarg, "-") == 0)
glfwWindowHint(GLFW_DEPTH_BITS, GLFW_DONT_CARE);
else
glfwWindowHint(GLFW_DEPTH_BITS, atoi(optarg));
break;
case STENCILBITS:
if (strcmp(optarg, "-") == 0)
glfwWindowHint(GLFW_STENCIL_BITS, GLFW_DONT_CARE);
else
glfwWindowHint(GLFW_STENCIL_BITS, atoi(optarg));
break;
case ACCUMREDBITS:
if (strcmp(optarg, "-") == 0)
glfwWindowHint(GLFW_ACCUM_RED_BITS, GLFW_DONT_CARE);
else
glfwWindowHint(GLFW_ACCUM_RED_BITS, atoi(optarg));
break;
case ACCUMGREENBITS:
if (strcmp(optarg, "-") == 0)
glfwWindowHint(GLFW_ACCUM_GREEN_BITS, GLFW_DONT_CARE);
else
glfwWindowHint(GLFW_ACCUM_GREEN_BITS, atoi(optarg));
break;
case ACCUMBLUEBITS:
if (strcmp(optarg, "-") == 0)
glfwWindowHint(GLFW_ACCUM_BLUE_BITS, GLFW_DONT_CARE);
else
glfwWindowHint(GLFW_ACCUM_BLUE_BITS, atoi(optarg));
break;
case ACCUMALPHABITS:
if (strcmp(optarg, "-") == 0)
glfwWindowHint(GLFW_ACCUM_ALPHA_BITS, GLFW_DONT_CARE);
else
glfwWindowHint(GLFW_ACCUM_ALPHA_BITS, atoi(optarg));
break;
case AUXBUFFERS:
if (strcmp(optarg, "-") == 0)
glfwWindowHint(GLFW_AUX_BUFFERS, GLFW_DONT_CARE);
else
glfwWindowHint(GLFW_AUX_BUFFERS, atoi(optarg));
break;
case SAMPLES:
if (strcmp(optarg, "-") == 0)
glfwWindowHint(GLFW_SAMPLES, GLFW_DONT_CARE);
else
glfwWindowHint(GLFW_SAMPLES, atoi(optarg));
break;
case STEREO:
glfwWindowHint(GLFW_STEREO, GLFW_TRUE);
break;
case SRGB:
glfwWindowHint(GLFW_SRGB_CAPABLE, GLFW_TRUE);
break;
case SINGLEBUFFER:
glfwWindowHint(GLFW_DOUBLEBUFFER, GLFW_FALSE);
break;
case NOERROR_SRSLY:
glfwWindowHint(GLFW_CONTEXT_NO_ERROR, GLFW_TRUE);
break;
default:
usage();
exit(EXIT_FAILURE);
}
}
print_version();
glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE);
window = glfwCreateWindow(200, 200, "Version", NULL, NULL);
if (!window)
{
glfwTerminate();
exit(EXIT_FAILURE);
}
glfwMakeContextCurrent(window);
gladLoadGLLoader((GLADloadproc) glfwGetProcAddress);
error = glGetError();
if (error != GL_NO_ERROR)
printf("*** OpenGL error after make current: 0x%08x ***\n", error);
// Report client API version
client = glfwGetWindowAttrib(window, GLFW_CLIENT_API);
context = glfwGetWindowAttrib(window, GLFW_CONTEXT_CREATION_API);
major = glfwGetWindowAttrib(window, GLFW_CONTEXT_VERSION_MAJOR);
minor = glfwGetWindowAttrib(window, GLFW_CONTEXT_VERSION_MINOR);
revision = glfwGetWindowAttrib(window, GLFW_CONTEXT_REVISION);
profile = glfwGetWindowAttrib(window, GLFW_OPENGL_PROFILE);
printf("%s context version string: \"%s\"\n",
get_api_name(client),
glGetString(GL_VERSION));
printf("%s context version parsed by GLFW: %u.%u.%u\n",
get_api_name(client),
major, minor, revision);
// Report client API context properties
if (client == GLFW_OPENGL_API)
{
if (major >= 3)
{
GLint flags;
glGetIntegerv(GL_CONTEXT_FLAGS, &flags);
printf("%s context flags (0x%08x):", get_api_name(client), flags);
if (flags & GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT)
printf(" forward-compatible");
if (flags & 2/*GL_CONTEXT_FLAG_DEBUG_BIT*/)
printf(" debug");
if (flags & GL_CONTEXT_FLAG_ROBUST_ACCESS_BIT_ARB)
printf(" robustness");
if (flags & 8/*GL_CONTEXT_FLAG_NO_ERROR_BIT_KHR*/)
printf(" no-error");
putchar('\n');
printf("%s context flags parsed by GLFW:", get_api_name(client));
if (glfwGetWindowAttrib(window, GLFW_OPENGL_FORWARD_COMPAT))
printf(" forward-compatible");
if (glfwGetWindowAttrib(window, GLFW_OPENGL_DEBUG_CONTEXT))
printf(" debug");
if (glfwGetWindowAttrib(window, GLFW_CONTEXT_ROBUSTNESS) == GLFW_LOSE_CONTEXT_ON_RESET)
printf(" robustness");
if (glfwGetWindowAttrib(window, GLFW_CONTEXT_NO_ERROR))
printf(" no-error");
putchar('\n');
}
if (major >= 4 || (major == 3 && minor >= 2))
{
GLint mask;
glGetIntegerv(GL_CONTEXT_PROFILE_MASK, &mask);
printf("%s profile mask (0x%08x): %s\n",
get_api_name(client),
mask,
get_profile_name_gl(mask));
printf("%s profile mask parsed by GLFW: %s\n",
get_api_name(client),
get_profile_name_glfw(profile));
}
if (glfwExtensionSupported("GL_ARB_robustness"))
{
const int robustness = glfwGetWindowAttrib(window, GLFW_CONTEXT_ROBUSTNESS);
GLint strategy;
glGetIntegerv(GL_RESET_NOTIFICATION_STRATEGY_ARB, &strategy);
printf("%s robustness strategy (0x%08x): %s\n",
get_api_name(client),
strategy,
get_strategy_name_gl(strategy));
printf("%s robustness strategy parsed by GLFW: %s\n",
get_api_name(client),
get_strategy_name_glfw(robustness));
}
}
printf("%s context renderer string: \"%s\"\n",
get_api_name(client),
glGetString(GL_RENDERER));
printf("%s context vendor string: \"%s\"\n",
get_api_name(client),
glGetString(GL_VENDOR));
if (major >= 2)
{
printf("%s context shading language version: \"%s\"\n",
get_api_name(client),
glGetString(GL_SHADING_LANGUAGE_VERSION));
}
printf("%s framebuffer:\n", get_api_name(client));
if (client == GLFW_OPENGL_API && profile == GLFW_OPENGL_CORE_PROFILE)
{
glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER,
GL_BACK_LEFT,
GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE,
&redbits);
glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER,
GL_BACK_LEFT,
GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE,
&greenbits);
glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER,
GL_BACK_LEFT,
GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE,
&bluebits);
glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER,
GL_BACK_LEFT,
GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE,
&alphabits);
glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER,
GL_DEPTH,
GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE,
&depthbits);
glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER,
GL_STENCIL,
GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE,
&stencilbits);
}
else
{
glGetIntegerv(GL_RED_BITS, &redbits);
glGetIntegerv(GL_GREEN_BITS, &greenbits);
glGetIntegerv(GL_BLUE_BITS, &bluebits);
glGetIntegerv(GL_ALPHA_BITS, &alphabits);
glGetIntegerv(GL_DEPTH_BITS, &depthbits);
glGetIntegerv(GL_STENCIL_BITS, &stencilbits);
}
printf(" red: %u green: %u blue: %u alpha: %u depth: %u stencil: %u\n",
redbits, greenbits, bluebits, alphabits, depthbits, stencilbits);
if (client == GLFW_OPENGL_ES_API ||
glfwExtensionSupported("GL_ARB_multisample") ||
major > 1 || minor >= 3)
{
GLint samples, samplebuffers;
glGetIntegerv(GL_SAMPLES, &samples);
glGetIntegerv(GL_SAMPLE_BUFFERS, &samplebuffers);
printf(" samples: %u sample buffers: %u\n", samples, samplebuffers);
}
if (client == GLFW_OPENGL_API && profile != GLFW_OPENGL_CORE_PROFILE)
{
GLint accumredbits, accumgreenbits, accumbluebits, accumalphabits;
GLint auxbuffers;
glGetIntegerv(GL_ACCUM_RED_BITS, &accumredbits);
glGetIntegerv(GL_ACCUM_GREEN_BITS, &accumgreenbits);
glGetIntegerv(GL_ACCUM_BLUE_BITS, &accumbluebits);
glGetIntegerv(GL_ACCUM_ALPHA_BITS, &accumalphabits);
glGetIntegerv(GL_AUX_BUFFERS, &auxbuffers);
printf(" accum red: %u accum green: %u accum blue: %u accum alpha: %u aux buffers: %u\n",
accumredbits, accumgreenbits, accumbluebits, accumalphabits, auxbuffers);
}
if (list_extensions)
list_context_extensions(client, major, minor);
printf("Vulkan loader: %s\n",
glfwVulkanSupported() ? "available" : "missing");
if (glfwVulkanSupported())
{
uint32_t i, re_count, pd_count;
const char** re;
VkApplicationInfo ai = {VK_STRUCTURE_TYPE_APPLICATION_INFO};
VkInstanceCreateInfo ici = {VK_STRUCTURE_TYPE_APPLICATION_INFO};
VkInstance instance;
VkPhysicalDevice* pd;
PFN_vkCreateInstance vkCreateInstance = (PFN_vkCreateInstance)
glfwGetInstanceProcAddress(NULL, "vkCreateInstance");
PFN_vkDestroyInstance vkDestroyInstance;
PFN_vkEnumeratePhysicalDevices vkEnumeratePhysicalDevices;
PFN_vkGetPhysicalDeviceProperties vkGetPhysicalDeviceProperties;
re = glfwGetRequiredInstanceExtensions(&re_count);
printf("Vulkan required instance extensions:");
for (i = 0; i < re_count; i++)
printf(" %s", re[i]);
putchar('\n');
if (list_extensions)
list_vulkan_instance_extensions();
if (list_layers)
list_vulkan_instance_layers();
ai.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;
ai.pApplicationName = "glfwinfo";
ai.applicationVersion = GLFW_VERSION_MAJOR;
ai.pEngineName = "GLFW";
ai.engineVersion = GLFW_VERSION_MAJOR;
ai.apiVersion = VK_API_VERSION_1_0;
ici.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
ici.pApplicationInfo = &ai;
ici.enabledExtensionCount = re_count;
ici.ppEnabledExtensionNames = re;
if (vkCreateInstance(&ici, NULL, &instance) != VK_SUCCESS)
{
glfwTerminate();
exit(EXIT_FAILURE);
}
vkDestroyInstance = (PFN_vkDestroyInstance)
glfwGetInstanceProcAddress(instance, "vkDestroyInstance");
vkEnumeratePhysicalDevices = (PFN_vkEnumeratePhysicalDevices)
glfwGetInstanceProcAddress(instance, "vkEnumeratePhysicalDevices");
vkGetPhysicalDeviceProperties = (PFN_vkGetPhysicalDeviceProperties)
glfwGetInstanceProcAddress(instance, "vkGetPhysicalDeviceProperties");
if (vkEnumeratePhysicalDevices(instance, &pd_count, NULL) != VK_SUCCESS)
{
vkDestroyInstance(instance, NULL);
glfwTerminate();
exit(EXIT_FAILURE);
}
pd = (VkPhysicalDevice*) calloc(pd_count, sizeof(VkPhysicalDevice));
if (vkEnumeratePhysicalDevices(instance, &pd_count, pd) != VK_SUCCESS)
{
free(pd);
vkDestroyInstance(instance, NULL);
glfwTerminate();
exit(EXIT_FAILURE);
}
for (i = 0; i < pd_count; i++)
{
VkPhysicalDeviceProperties pdp;
vkGetPhysicalDeviceProperties(pd[i], &pdp);
printf("Vulkan %s device: \"%s\"\n",
get_device_type_name(pdp.deviceType),
pdp.deviceName);
if (list_extensions)
list_vulkan_device_extensions(instance, pd[i]);
if (list_layers)
list_vulkan_device_layers(instance, pd[i]);
}
free(pd);
vkDestroyInstance(instance, NULL);
}
glfwTerminate();
exit(EXIT_SUCCESS);
}
int main(int argc, char** argv)
{
int ch, samples = 4;
GLFWwindow window;
while ((ch = getopt(argc, argv, "hs:")) != -1)
{
switch (ch)
{
case 'h':
usage();
exit(EXIT_SUCCESS);
case 's':
samples = atoi(optarg);
break;
default:
usage();
exit(EXIT_FAILURE);
}
}
if (!glfwInit())
{
fprintf(stderr, "Failed to initialize GLFW: %s\n", glfwErrorString(glfwGetError()));
exit(EXIT_FAILURE);
}
if (samples)
printf("Requesting FSAA with %i samples\n", samples);
else
printf("Requesting that FSAA not be available\n");
glfwWindowHint(GLFW_FSAA_SAMPLES, samples);
window = glfwCreateWindow(800, 400, GLFW_WINDOWED, "Aliasing Detector", NULL);
if (!window)
{
glfwTerminate();
fprintf(stderr, "Failed to open GLFW window: %s\n", glfwErrorString(glfwGetError()));
exit(EXIT_FAILURE);
}
glfwSetKeyCallback(window, key_callback);
glfwSetWindowSizeCallback(window, window_size_callback);
glfwMakeContextCurrent(window);
glfwSwapInterval(1);
if (!glfwExtensionSupported("GL_ARB_multisample"))
{
glfwTerminate();
fprintf(stderr, "Context reports GL_ARB_multisample is not supported\n");
exit(EXIT_FAILURE);
}
glGetIntegerv(GL_SAMPLES_ARB, &samples);
if (samples)
printf("Context reports FSAA is available with %i samples\n", samples);
else
printf("Context reports FSAA is unavailable\n");
glMatrixMode(GL_PROJECTION);
gluOrtho2D(0.f, 1.f, 0.f, 0.5f);
glMatrixMode(GL_MODELVIEW);
while (!glfwGetWindowParam(window, GLFW_CLOSE_REQUESTED))
{
GLfloat time = (GLfloat) glfwGetTime();
glClear(GL_COLOR_BUFFER_BIT);
glLoadIdentity();
glTranslatef(0.25f, 0.25f, 0.f);
glRotatef(time, 0.f, 0.f, 1.f);
glDisable(GL_MULTISAMPLE_ARB);
glRectf(-0.15f, -0.15f, 0.15f, 0.15f);
glLoadIdentity();
glTranslatef(0.75f, 0.25f, 0.f);
glRotatef(time, 0.f, 0.f, 1.f);
glEnable(GL_MULTISAMPLE_ARB);
glRectf(-0.15f, -0.15f, 0.15f, 0.15f);
glfwSwapBuffers(window);
glfwPollEvents();
}
glfwTerminate();
exit(EXIT_SUCCESS);
}
GLFWAPI int GLFWAPIENTRY glfwOpenWindow( int width, int height,
int redbits, int greenbits, int bluebits, int alphabits,
int depthbits, int stencilbits, int mode )
{
int AccumRedBits, AccumGreenBits, AccumBlueBits, AccumAlphaBits;
int AuxBuffers, Stereo, RefreshRate, x, Samples;
// Is GLFW initialized?
if( !_glfwInitialized || _glfwWin.Opened )
{
return GL_FALSE;
}
// Check input arguments
if( mode != GLFW_WINDOW && mode != GLFW_FULLSCREEN )
{
return GL_FALSE;
}
// Clear GLFW window state
_glfwWin.Active = GL_TRUE;
_glfwWin.Iconified = GL_FALSE;
_glfwWin.MouseLock = GL_FALSE;
_glfwWin.AutoPollEvents = GL_TRUE;
_glfwClearInput();
// Unregister all callback functions
_glfwWin.WindowSizeCallback = NULL;
_glfwWin.WindowCloseCallback = NULL;
_glfwWin.WindowRefreshCallback = NULL;
_glfwWin.KeyCallback = NULL;
_glfwWin.CharCallback = NULL;
_glfwWin.MousePosCallback = NULL;
_glfwWin.MouseButtonCallback = NULL;
_glfwWin.MouseWheelCallback = NULL;
// Get window hints
AccumRedBits = _glfwWinHints.AccumRedBits;
AccumGreenBits = _glfwWinHints.AccumGreenBits;
AccumBlueBits = _glfwWinHints.AccumBlueBits;
AccumAlphaBits = _glfwWinHints.AccumAlphaBits;
AuxBuffers = _glfwWinHints.AuxBuffers;
Stereo = _glfwWinHints.Stereo;
RefreshRate = _glfwWinHints.RefreshRate;
Samples = _glfwWinHints.Samples;
// Check width & height
if( width > 0 && height <= 0 )
{
// Set the window aspect ratio to 4:3
height = (width * 3) / 4;
}
else if( width <= 0 && height > 0 )
{
// Set the window aspect ratio to 4:3
width = (height * 4) / 3;
}
else if( width <= 0 && height <= 0 )
{
// Default window size
width = 640;
height = 480;
}
// Remember window settings
_glfwWin.Width = width;
_glfwWin.Height = height;
_glfwWin.Fullscreen = (mode == GLFW_FULLSCREEN ? 1 : 0);
_glfwWin.WindowNoResize = _glfwWinHints.WindowNoResize;
// Platform specific window opening routine
if( !_glfwPlatformOpenWindow( width, height, redbits, greenbits,
bluebits, alphabits, depthbits, stencilbits, mode,
AccumRedBits, AccumGreenBits, AccumBlueBits, AccumAlphaBits,
AuxBuffers, Stereo, RefreshRate, Samples ) )
{
return GL_FALSE;
}
// Flag that window is now opened
_glfwWin.Opened = GL_TRUE;
// Clear window hints
_glfwWinHints.RefreshRate = 0;
_glfwWinHints.AccumRedBits = 0;
_glfwWinHints.AccumGreenBits = 0;
_glfwWinHints.AccumBlueBits = 0;
_glfwWinHints.AccumAlphaBits = 0;
_glfwWinHints.AuxBuffers = 0;
_glfwWinHints.Stereo = 0;
_glfwWinHints.WindowNoResize = 0;
_glfwWinHints.Samples = 0;
// Get window parameters (such as color buffer bits etc)
_glfwPlatformRefreshWindowParams();
// Get OpenGL version
glfwGetGLVersion( &_glfwWin.GLVerMajor, &_glfwWin.GLVerMinor, &x );
// Do we have non-power-of-two textures?
_glfwWin.Has_GL_ARB_texture_non_power_of_two =
glfwExtensionSupported( "GL_ARB_texture_non_power_of_two" );
// Do we have automatic mipmap generation?
_glfwWin.Has_GL_SGIS_generate_mipmap =
(_glfwWin.GLVerMajor >= 2) || (_glfwWin.GLVerMinor >= 4) ||
glfwExtensionSupported( "GL_SGIS_generate_mipmap" );
// If full-screen mode was requested, disable mouse cursor
if( mode == GLFW_FULLSCREEN )
{
glfwDisable( GLFW_MOUSE_CURSOR );
}
return GL_TRUE;
}
int main(int argc, char** argv)
{
int ch, api = 0, profile = 0, strategy = 0, major = 1, minor = 0, revision;
GLboolean debug = GL_FALSE, forward = GL_FALSE, list = GL_FALSE;
GLint flags, mask;
GLFWwindow* window;
if (!valid_version())
exit(EXIT_FAILURE);
while ((ch = getopt(argc, argv, "a:dfhlm:n:p:r:")) != -1)
{
switch (ch)
{
case 'a':
if (strcasecmp(optarg, API_OPENGL) == 0)
api = GLFW_OPENGL_API;
else if (strcasecmp(optarg, API_OPENGL_ES) == 0)
api = GLFW_OPENGL_ES_API;
else
{
usage();
exit(EXIT_FAILURE);
}
case 'd':
debug = GL_TRUE;
break;
case 'f':
forward = GL_TRUE;
break;
case 'h':
usage();
exit(EXIT_SUCCESS);
case 'l':
list = GL_TRUE;
break;
case 'm':
major = atoi(optarg);
break;
case 'n':
minor = atoi(optarg);
break;
case 'p':
if (strcasecmp(optarg, PROFILE_NAME_CORE) == 0)
profile = GLFW_OPENGL_CORE_PROFILE;
else if (strcasecmp(optarg, PROFILE_NAME_COMPAT) == 0)
profile = GLFW_OPENGL_COMPAT_PROFILE;
else
{
usage();
exit(EXIT_FAILURE);
}
break;
case 'r':
if (strcasecmp(optarg, STRATEGY_NAME_NONE) == 0)
strategy = GLFW_NO_RESET_NOTIFICATION;
else if (strcasecmp(optarg, STRATEGY_NAME_LOSE) == 0)
strategy = GLFW_LOSE_CONTEXT_ON_RESET;
else
{
usage();
exit(EXIT_FAILURE);
}
break;
default:
usage();
exit(EXIT_FAILURE);
}
}
argc -= optind;
argv += optind;
// Initialize GLFW and create window
glfwSetErrorCallback(error_callback, NULL);
if (!glfwInit())
exit(EXIT_FAILURE);
if (major != 1 || minor != 0)
{
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, major);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, minor);
}
if (api != 0)
glfwWindowHint(GLFW_CLIENT_API, api);
if (debug)
glfwWindowHint(GLFW_OPENGL_DEBUG_CONTEXT, GL_TRUE);
if (forward)
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
if (profile != 0)
glfwWindowHint(GLFW_OPENGL_PROFILE, profile);
if (strategy)
glfwWindowHint(GLFW_CONTEXT_ROBUSTNESS, strategy);
glfwWindowHint(GLFW_VISIBLE, GL_FALSE);
window = glfwCreateWindow(200, 200, "Version", NULL, NULL);
if (!window)
{
glfwTerminate();
exit(EXIT_FAILURE);
}
glfwMakeContextCurrent(window);
// Report client API version
api = glfwGetWindowAttrib(window, GLFW_CLIENT_API);
major = glfwGetWindowAttrib(window, GLFW_CONTEXT_VERSION_MAJOR);
minor = glfwGetWindowAttrib(window, GLFW_CONTEXT_VERSION_MINOR);
revision = glfwGetWindowAttrib(window, GLFW_CONTEXT_REVISION);
printf("%s context version string: \"%s\"\n",
get_client_api_name(api),
glGetString(GL_VERSION));
printf("%s context version parsed by GLFW: %u.%u.%u\n",
get_client_api_name(api),
major, minor, revision);
// Report client API context properties
if (api == GLFW_OPENGL_API)
{
if (major >= 3)
{
glGetIntegerv(GL_CONTEXT_FLAGS, &flags);
printf("%s context flags (0x%08x):", get_client_api_name(api), flags);
if (flags & GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT)
printf(" forward-compatible");
if (flags & GL_CONTEXT_FLAG_DEBUG_BIT)
printf(" debug");
if (flags & GL_CONTEXT_FLAG_ROBUST_ACCESS_BIT_ARB)
printf(" robustness");
putchar('\n');
printf("%s context flags parsed by GLFW:", get_client_api_name(api));
if (glfwGetWindowAttrib(window, GLFW_OPENGL_FORWARD_COMPAT))
printf(" forward-compatible");
if (glfwGetWindowAttrib(window, GLFW_OPENGL_DEBUG_CONTEXT))
printf(" debug");
if (glfwGetWindowAttrib(window, GLFW_CONTEXT_ROBUSTNESS) != GLFW_NO_ROBUSTNESS)
printf(" robustness");
putchar('\n');
}
if (major > 3 || (major == 3 && minor >= 2))
{
int profile = glfwGetWindowAttrib(window, GLFW_OPENGL_PROFILE);
glGetIntegerv(GL_CONTEXT_PROFILE_MASK, &mask);
printf("%s profile mask (0x%08x): %s\n",
get_client_api_name(api),
mask,
get_profile_name_gl(mask));
printf("%s profile mask parsed by GLFW: %s\n",
get_client_api_name(api),
get_profile_name_glfw(profile));
}
if (glfwExtensionSupported("GL_ARB_robustness"))
{
int robustness;
GLint strategy;
glGetIntegerv(GL_RESET_NOTIFICATION_STRATEGY_ARB, &strategy);
printf("%s robustness strategy (0x%08x): %s\n",
get_client_api_name(api),
strategy,
get_strategy_name_gl(strategy));
robustness = glfwGetWindowAttrib(window, GLFW_CONTEXT_ROBUSTNESS);
printf("%s robustness strategy parsed by GLFW: %s\n",
get_client_api_name(api),
get_strategy_name_glfw(robustness));
}
}
printf("%s context renderer string: \"%s\"\n",
get_client_api_name(api),
glGetString(GL_RENDERER));
printf("%s context vendor string: \"%s\"\n",
get_client_api_name(api),
glGetString(GL_VENDOR));
if (major > 1)
{
printf("%s context shading language version: \"%s\"\n",
get_client_api_name(api),
glGetString(GL_SHADING_LANGUAGE_VERSION));
}
// Report client API extensions
if (list)
list_extensions(api, major, minor);
glfwTerminate();
exit(EXIT_SUCCESS);
}
GLboolean _glfwRefreshContextAttribs(const _GLFWctxconfig* ctxconfig)
{
_GLFWwindow* window = _glfwPlatformGetCurrentContext();
window->GetIntegerv = (PFNGLGETINTEGERVPROC) glfwGetProcAddress("glGetIntegerv");
window->GetString = (PFNGLGETSTRINGPROC) glfwGetProcAddress("glGetString");
window->Clear = (PFNGLCLEARPROC) glfwGetProcAddress("glClear");
if (!parseVersionString(&window->context.api,
&window->context.major,
&window->context.minor,
&window->context.revision))
{
return GL_FALSE;
}
#if defined(_GLFW_USE_OPENGL)
if (window->context.major > 2)
{
// OpenGL 3.0+ uses a different function for extension string retrieval
// We cache it here instead of in glfwExtensionSupported mostly to alert
// users as early as possible that their build may be broken
window->GetStringi = (PFNGLGETSTRINGIPROC) glfwGetProcAddress("glGetStringi");
if (!window->GetStringi)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Entry point retrieval is broken");
return GL_FALSE;
}
}
if (window->context.api == GLFW_OPENGL_API)
{
// Read back context flags (OpenGL 3.0 and above)
if (window->context.major >= 3)
{
GLint flags;
window->GetIntegerv(GL_CONTEXT_FLAGS, &flags);
if (flags & GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT)
window->context.forward = GL_TRUE;
if (flags & GL_CONTEXT_FLAG_DEBUG_BIT)
window->context.debug = GL_TRUE;
else if (glfwExtensionSupported("GL_ARB_debug_output") &&
ctxconfig->debug)
{
// HACK: This is a workaround for older drivers (pre KHR_debug)
// not setting the debug bit in the context flags for
// debug contexts
window->context.debug = GL_TRUE;
}
}
// Read back OpenGL context profile (OpenGL 3.2 and above)
if (window->context.major > 3 ||
(window->context.major == 3 && window->context.minor >= 2))
{
GLint mask;
window->GetIntegerv(GL_CONTEXT_PROFILE_MASK, &mask);
if (mask & GL_CONTEXT_COMPATIBILITY_PROFILE_BIT)
window->context.profile = GLFW_OPENGL_COMPAT_PROFILE;
else if (mask & GL_CONTEXT_CORE_PROFILE_BIT)
window->context.profile = GLFW_OPENGL_CORE_PROFILE;
else if (glfwExtensionSupported("GL_ARB_compatibility"))
{
// HACK: This is a workaround for the compatibility profile bit
// not being set in the context flags if an OpenGL 3.2+
// context was created without having requested a specific
// version
window->context.profile = GLFW_OPENGL_COMPAT_PROFILE;
}
}
// Read back robustness strategy
if (glfwExtensionSupported("GL_ARB_robustness"))
{
// NOTE: We avoid using the context flags for detection, as they are
// only present from 3.0 while the extension applies from 1.1
GLint strategy;
window->GetIntegerv(GL_RESET_NOTIFICATION_STRATEGY_ARB, &strategy);
if (strategy == GL_LOSE_CONTEXT_ON_RESET_ARB)
window->context.robustness = GLFW_LOSE_CONTEXT_ON_RESET;
else if (strategy == GL_NO_RESET_NOTIFICATION_ARB)
window->context.robustness = GLFW_NO_RESET_NOTIFICATION;
}
}
else
{
// Read back robustness strategy
if (glfwExtensionSupported("GL_EXT_robustness"))
{
// NOTE: The values of these constants match those of the OpenGL ARB
// one, so we can reuse them here
GLint strategy;
window->GetIntegerv(GL_RESET_NOTIFICATION_STRATEGY_ARB, &strategy);
if (strategy == GL_LOSE_CONTEXT_ON_RESET_ARB)
window->context.robustness = GLFW_LOSE_CONTEXT_ON_RESET;
else if (strategy == GL_NO_RESET_NOTIFICATION_ARB)
window->context.robustness = GLFW_NO_RESET_NOTIFICATION;
}
}
if (glfwExtensionSupported("GL_KHR_context_flush_control"))
{
GLint behavior;
window->GetIntegerv(GL_CONTEXT_RELEASE_BEHAVIOR, &behavior);
if (behavior == GL_NONE)
window->context.release = GLFW_RELEASE_BEHAVIOR_NONE;
else if (behavior == GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH)
window->context.release = GLFW_RELEASE_BEHAVIOR_FLUSH;
}
#endif // _GLFW_USE_OPENGL
return GL_TRUE;
}
int main(int argc, char** argv)
{
int ch, width, height;
thrd_t physics_thread = 0;
GLFWwindow* window;
GLFWmonitor* monitor = NULL;
if (!glfwInit())
{
fprintf(stderr, "Failed to initialize GLFW\n");
exit(EXIT_FAILURE);
}
while ((ch = getopt(argc, argv, "fh")) != -1)
{
switch (ch)
{
case 'f':
monitor = glfwGetPrimaryMonitor();
break;
case 'h':
usage();
exit(EXIT_SUCCESS);
}
}
if (monitor)
{
const GLFWvidmode* mode = glfwGetVideoMode(monitor);
glfwWindowHint(GLFW_RED_BITS, mode->redBits);
glfwWindowHint(GLFW_GREEN_BITS, mode->greenBits);
glfwWindowHint(GLFW_BLUE_BITS, mode->blueBits);
glfwWindowHint(GLFW_REFRESH_RATE, mode->refreshRate);
width = mode->width;
height = mode->height;
}
else
{
width = 640;
height = 480;
}
window = glfwCreateWindow(width, height, "Particle Engine", monitor, NULL);
if (!window)
{
fprintf(stderr, "Failed to create GLFW window\n");
glfwTerminate();
exit(EXIT_FAILURE);
}
if (monitor)
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
glfwMakeContextCurrent(window);
glfwSwapInterval(1);
glfwSetWindowSizeCallback(window, resize_callback);
glfwSetKeyCallback(window, key_callback);
// Set initial aspect ratio
glfwGetWindowSize(window, &width, &height);
resize_callback(window, width, height);
// Upload particle texture
glGenTextures(1, &particle_tex_id);
glBindTexture(GL_TEXTURE_2D, particle_tex_id);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, P_TEX_WIDTH, P_TEX_HEIGHT,
0, GL_LUMINANCE, GL_UNSIGNED_BYTE, particle_texture);
// Upload floor texture
glGenTextures(1, &floor_tex_id);
glBindTexture(GL_TEXTURE_2D, floor_tex_id);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, F_TEX_WIDTH, F_TEX_HEIGHT,
0, GL_LUMINANCE, GL_UNSIGNED_BYTE, floor_texture);
if (glfwExtensionSupported("GL_EXT_separate_specular_color"))
{
glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL_EXT,
GL_SEPARATE_SPECULAR_COLOR_EXT);
}
// Set filled polygon mode as default (not wireframe)
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
wireframe = 0;
// Set initial times
thread_sync.t = 0.0;
thread_sync.dt = 0.001f;
thread_sync.p_frame = 0;
thread_sync.d_frame = 0;
mtx_init(&thread_sync.particles_lock, mtx_timed);
cnd_init(&thread_sync.p_done);
cnd_init(&thread_sync.d_done);
if (thrd_create(&physics_thread, physics_thread_main, window) != thrd_success)
{
glfwTerminate();
exit(EXIT_FAILURE);
}
glfwSetTime(0.0);
while (!glfwWindowShouldClose(window))
{
draw_scene(window, glfwGetTime());
glfwSwapBuffers(window);
glfwPollEvents();
}
thrd_join(physics_thread, NULL);
glfwDestroyWindow(window);
glfwTerminate();
exit(EXIT_SUCCESS);
}
int main(int argc, char** argv)
{
int ch, width, height;
float position;
unsigned long frame_count = 0;
double last_time, current_time;
GLboolean fullscreen = GL_FALSE;
GLFWmonitor* monitor = NULL;
GLFWwindow* window;
while ((ch = getopt(argc, argv, "fh")) != -1)
{
switch (ch)
{
case 'h':
usage();
exit(EXIT_SUCCESS);
case 'f':
fullscreen = GL_TRUE;
break;
}
}
glfwSetErrorCallback(error_callback);
if (!glfwInit())
exit(EXIT_FAILURE);
if (fullscreen)
{
const GLFWvidmode* mode;
monitor = glfwGetPrimaryMonitor();
mode = glfwGetVideoMode(monitor);
glfwWindowHint(GLFW_RED_BITS, mode->redBits);
glfwWindowHint(GLFW_GREEN_BITS, mode->greenBits);
glfwWindowHint(GLFW_BLUE_BITS, mode->blueBits);
glfwWindowHint(GLFW_REFRESH_RATE, mode->refreshRate);
width = mode->width;
height = mode->height;
}
else
{
width = 640;
height = 480;
}
window = glfwCreateWindow(width, height, "", monitor, NULL);
if (!window)
{
glfwTerminate();
exit(EXIT_FAILURE);
}
glfwMakeContextCurrent(window);
set_swap_interval(window, 0);
last_time = glfwGetTime();
frame_rate = 0.0;
swap_tear = (glfwExtensionSupported("WGL_EXT_swap_control_tear") ||
glfwExtensionSupported("GLX_EXT_swap_control_tear"));
glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
glfwSetKeyCallback(window, key_callback);
glMatrixMode(GL_PROJECTION);
glOrtho(-1.f, 1.f, -1.f, 1.f, 1.f, -1.f);
glMatrixMode(GL_MODELVIEW);
while (!glfwWindowShouldClose(window))
{
glClear(GL_COLOR_BUFFER_BIT);
position = cosf((float) glfwGetTime() * 4.f) * 0.75f;
glRectf(position - 0.25f, -1.f, position + 0.25f, 1.f);
glfwSwapBuffers(window);
glfwPollEvents();
frame_count++;
current_time = glfwGetTime();
if (current_time - last_time > 1.0)
{
frame_rate = frame_count / (current_time - last_time);
frame_count = 0;
last_time = current_time;
update_window_title(window);
}
}
glfwTerminate();
exit(EXIT_SUCCESS);
}
GLboolean _glfwRefreshContextAttribs(void)
{
_GLFWwindow* window = _glfwPlatformGetCurrentContext();
if (!parseGLVersion(&window->clientAPI,
&window->glMajor,
&window->glMinor,
&window->glRevision))
{
return GL_FALSE;
}
#if defined(_GLFW_USE_OPENGL)
if (window->glMajor > 2)
{
// OpenGL 3.0+ uses a different function for extension string retrieval
// We cache it here instead of in glfwExtensionSupported mostly to alert
// users as early as possible that their build may be broken
window->GetStringi = (PFNGLGETSTRINGIPROC) glfwGetProcAddress("glGetStringi");
if (!window->GetStringi)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Entry point retrieval is broken");
return GL_FALSE;
}
}
if (window->clientAPI == GLFW_OPENGL_API)
{
// Read back context flags (OpenGL 3.0 and above)
if (window->glMajor >= 3)
{
GLint flags;
glGetIntegerv(GL_CONTEXT_FLAGS, &flags);
if (flags & GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT)
window->glForward = GL_TRUE;
if (flags & GL_CONTEXT_FLAG_DEBUG_BIT)
window->glDebug = GL_TRUE;
else if (glfwExtensionSupported("GL_ARB_debug_output"))
{
// HACK: This is a workaround for older drivers (pre KHR_debug)
// not setting the debug bit in the context flags for debug
// contexts
window->glDebug = GL_TRUE;
}
}
// Read back OpenGL context profile (OpenGL 3.2 and above)
if (window->glMajor > 3 ||
(window->glMajor == 3 && window->glMinor >= 2))
{
GLint mask;
glGetIntegerv(GL_CONTEXT_PROFILE_MASK, &mask);
if (mask & GL_CONTEXT_COMPATIBILITY_PROFILE_BIT)
window->glProfile = GLFW_OPENGL_COMPAT_PROFILE;
else if (mask & GL_CONTEXT_CORE_PROFILE_BIT)
window->glProfile = GLFW_OPENGL_CORE_PROFILE;
}
// Read back robustness strategy
if (glfwExtensionSupported("GL_ARB_robustness"))
{
// NOTE: We avoid using the context flags for detection, as they are
// only present from 3.0 while the extension applies from 1.1
GLint strategy;
glGetIntegerv(GL_RESET_NOTIFICATION_STRATEGY_ARB, &strategy);
if (strategy == GL_LOSE_CONTEXT_ON_RESET_ARB)
window->glRobustness = GLFW_LOSE_CONTEXT_ON_RESET;
else if (strategy == GL_NO_RESET_NOTIFICATION_ARB)
window->glRobustness = GLFW_NO_RESET_NOTIFICATION;
}
}
else
{
// Read back robustness strategy
if (glfwExtensionSupported("GL_EXT_robustness"))
{
// NOTE: The values of these constants match those of the OpenGL ARB
// one, so we can reuse them here
GLint strategy;
glGetIntegerv(GL_RESET_NOTIFICATION_STRATEGY_ARB, &strategy);
if (strategy == GL_LOSE_CONTEXT_ON_RESET_ARB)
window->glRobustness = GLFW_LOSE_CONTEXT_ON_RESET;
else if (strategy == GL_NO_RESET_NOTIFICATION_ARB)
window->glRobustness = GLFW_NO_RESET_NOTIFICATION;
}
}
#endif // _GLFW_USE_OPENGL
return GL_TRUE;
}
int main(int argc, char** argv)
{
unsigned long frame_count = 0;
double last_time, current_time;
GLFWwindow* window;
GLuint vertex_buffer, vertex_shader, fragment_shader, program;
GLint mvp_location, vpos_location;
glfwSetErrorCallback(error_callback);
if (!glfwInit())
exit(EXIT_FAILURE);
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 2);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
window = glfwCreateWindow(640, 480, "Tearing detector", NULL, NULL);
if (!window)
{
glfwTerminate();
exit(EXIT_FAILURE);
}
glfwMakeContextCurrent(window);
gladLoadGL(glfwGetProcAddress);
set_swap_interval(window, 0);
last_time = glfwGetTime();
frame_rate = 0.0;
swap_tear = (glfwExtensionSupported("WGL_EXT_swap_control_tear") ||
glfwExtensionSupported("GLX_EXT_swap_control_tear"));
glfwSetKeyCallback(window, key_callback);
glGenBuffers(1, &vertex_buffer);
glBindBuffer(GL_ARRAY_BUFFER, vertex_buffer);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
vertex_shader = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(vertex_shader, 1, &vertex_shader_text, NULL);
glCompileShader(vertex_shader);
fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(fragment_shader, 1, &fragment_shader_text, NULL);
glCompileShader(fragment_shader);
program = glCreateProgram();
glAttachShader(program, vertex_shader);
glAttachShader(program, fragment_shader);
glLinkProgram(program);
mvp_location = glGetUniformLocation(program, "MVP");
vpos_location = glGetAttribLocation(program, "vPos");
glEnableVertexAttribArray(vpos_location);
glVertexAttribPointer(vpos_location, 2, GL_FLOAT, GL_FALSE,
sizeof(vertices[0]), (void*) 0);
while (!glfwWindowShouldClose(window))
{
int width, height;
mat4x4 m, p, mvp;
float position = cosf((float) glfwGetTime() * 4.f) * 0.75f;
glfwGetFramebufferSize(window, &width, &height);
glViewport(0, 0, width, height);
glClear(GL_COLOR_BUFFER_BIT);
mat4x4_ortho(p, -1.f, 1.f, -1.f, 1.f, 0.f, 1.f);
mat4x4_translate(m, position, 0.f, 0.f);
mat4x4_mul(mvp, p, m);
glUseProgram(program);
glUniformMatrix4fv(mvp_location, 1, GL_FALSE, (const GLfloat*) mvp);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
glfwSwapBuffers(window);
glfwPollEvents();
frame_count++;
current_time = glfwGetTime();
if (current_time - last_time > 1.0)
{
frame_rate = frame_count / (current_time - last_time);
frame_count = 0;
last_time = current_time;
update_window_title(window);
}
}
glfwTerminate();
exit(EXIT_SUCCESS);
}
bool isExtensionSupported(const char* ext) {
return glfwExtensionSupported(ext) ? true : false;
}
GLFWAPI int GLFWAPIENTRY glfwOpenWindow( int width, int height,
int redbits, int greenbits, int bluebits, int alphabits,
int depthbits, int stencilbits, int mode )
{
_GLFWfbconfig fbconfig;
_GLFWwndconfig wndconfig;
if( !_glfwInitialized || _glfwWin.opened )
{
return GL_FALSE;
}
// Set up desired framebuffer config
fbconfig.redBits = Max( redbits, 0 );
fbconfig.greenBits = Max( greenbits, 0 );
fbconfig.blueBits = Max( bluebits, 0 );
fbconfig.alphaBits = Max( alphabits, 0 );
fbconfig.depthBits = Max( depthbits, 0 );
fbconfig.stencilBits = Max( stencilbits, 0 );
fbconfig.accumRedBits = Max( _glfwLibrary.hints.accumRedBits, 0 );
fbconfig.accumGreenBits = Max( _glfwLibrary.hints.accumGreenBits, 0 );
fbconfig.accumBlueBits = Max( _glfwLibrary.hints.accumBlueBits, 0 );
fbconfig.accumAlphaBits = Max( _glfwLibrary.hints.accumAlphaBits, 0 );
fbconfig.auxBuffers = Max( _glfwLibrary.hints.auxBuffers, 0 );
fbconfig.stereo = _glfwLibrary.hints.stereo ? GL_TRUE : GL_FALSE;
fbconfig.samples = Max( _glfwLibrary.hints.samples, 0 );
// Set up desired window config
wndconfig.mode = mode;
wndconfig.refreshRate = Max( _glfwLibrary.hints.refreshRate, 0 );
wndconfig.windowNoResize = _glfwLibrary.hints.windowNoResize ? GL_TRUE : GL_FALSE;
wndconfig.glMajor = Max( _glfwLibrary.hints.glMajor, 1 );
wndconfig.glMinor = Max( _glfwLibrary.hints.glMinor, 0 );
wndconfig.glForward = _glfwLibrary.hints.glForward ? GL_TRUE : GL_FALSE;
wndconfig.glDebug = _glfwLibrary.hints.glDebug ? GL_TRUE : GL_FALSE;
wndconfig.glProfile = _glfwLibrary.hints.glProfile;
if( wndconfig.glMajor == 1 && wndconfig.glMinor > 5 )
{
// OpenGL 1.x series ended with version 1.5
return GL_FALSE;
}
else if( wndconfig.glMajor == 2 && wndconfig.glMinor > 1 )
{
// OpenGL 2.x series ended with version 2.1
return GL_FALSE;
}
else if( wndconfig.glMajor == 3 && wndconfig.glMinor > 3 )
{
// OpenGL 3.x series ended with version 3.3
return GL_FALSE;
}
else
{
// For now, let everything else through
}
if( wndconfig.glProfile &&
( wndconfig.glMajor < 3 || ( wndconfig.glMajor == 3 && wndconfig.glMinor < 2 ) ) )
{
// Context profiles are only defined for OpenGL version 3.2 and above
return GL_FALSE;
}
if( wndconfig.glForward && wndconfig.glMajor < 3 )
{
// Forward-compatible contexts are only defined for OpenGL version 3.0 and above
return GL_FALSE;
}
// Clear for next open call
_glfwClearWindowHints();
// Check input arguments
if( mode != GLFW_WINDOW && mode != GLFW_FULLSCREEN )
{
return GL_FALSE;
}
// Clear GLFW window state
_glfwWin.active = GL_TRUE;
_glfwWin.iconified = GL_FALSE;
_glfwWin.mouseLock = GL_FALSE;
_glfwWin.autoPollEvents = GL_TRUE;
_glfwClearInput();
// Unregister all callback functions
_glfwWin.windowSizeCallback = NULL;
_glfwWin.windowCloseCallback = NULL;
_glfwWin.windowRefreshCallback = NULL;
_glfwWin.keyCallback = NULL;
_glfwWin.charCallback = NULL;
_glfwWin.mousePosCallback = NULL;
_glfwWin.mouseButtonCallback = NULL;
_glfwWin.mouseWheelCallback = NULL;
// Check width & height
if( width > 0 && height <= 0 )
{
// Set the window aspect ratio to 4:3
height = (width * 3) / 4;
}
else if( width <= 0 && height > 0 )
{
// Set the window aspect ratio to 4:3
width = (height * 4) / 3;
}
else if( width <= 0 && height <= 0 )
{
// Default window size
width = 640;
height = 480;
}
// Remember window settings
_glfwWin.width = width;
_glfwWin.height = height;
_glfwWin.fullscreen = (mode == GLFW_FULLSCREEN ? GL_TRUE : GL_FALSE);
// Platform specific window opening routine
if( !_glfwPlatformOpenWindow( width, height, &wndconfig, &fbconfig ) )
{
glfwCloseWindow();
return GL_FALSE;
}
// Flag that window is now opened
_glfwWin.opened = GL_TRUE;
// Read back window and context parameters
_glfwPlatformRefreshWindowParams();
_glfwRefreshContextParams();
if( _glfwWin.glMajor < wndconfig.glMajor ||
( _glfwWin.glMajor == wndconfig.glMajor &&
_glfwWin.glMinor < wndconfig.glMinor ) )
{
glfwCloseWindow();
return GL_FALSE;
}
// Do we have non-power-of-two textures (added to core in version 2.0)?
_glfwWin.has_GL_ARB_texture_non_power_of_two =
( _glfwWin.glMajor >= 2 ) ||
glfwExtensionSupported( "GL_ARB_texture_non_power_of_two" );
// Do we have automatic mipmap generation (added to core in version 1.4)?
_glfwWin.has_GL_SGIS_generate_mipmap =
( _glfwWin.glMajor >= 2 ) || ( _glfwWin.glMinor >= 4 ) ||
glfwExtensionSupported( "GL_SGIS_generate_mipmap" );
if( _glfwWin.glMajor > 2 )
{
_glfwWin.GetStringi = (PFNGLGETSTRINGIPROC) glfwGetProcAddress( "glGetStringi" );
if( !_glfwWin.GetStringi )
{
// This is a very common problem among people who compile GLFW
// on X11/GLX using custom build systems, as the glfwGetProcAddress
// code path selection needs explicit configuration
//
// See readme.html section 2.2 for details
glfwCloseWindow();
return GL_FALSE;
}
}
// If full-screen mode was requested, disable mouse cursor
if( mode == GLFW_FULLSCREEN )
{
glfwDisable( GLFW_MOUSE_CURSOR );
}
// Start by clearing the front buffer to black (avoid ugly desktop
// remains in our OpenGL window)
glClear( GL_COLOR_BUFFER_BIT );
_glfwPlatformSwapBuffers();
return GL_TRUE;
}
static void
Init(void)
{
const GLubyte *extensions;
GLboolean hasDebugExtension;
extensions = glGetString(GL_EXTENSIONS);
checkGlError("glGetString(GL_EXTENSIONS)");
hasDebugExtension = checkExtension(debugExtensionString, extensions);
if (GLAD_GL_VERSION_3_0) {
GLboolean hasDebugExtension3 = GL_FALSE;
GLint i;
GLint num_extensions = 0;
glGetIntegerv(GL_NUM_EXTENSIONS, &num_extensions);
checkGlError("glGetIntegerv(GL_NUM_EXTENSIONS)");
for (i = 0; i < num_extensions; ++i) {
const char *extension;
extension = (const char *)glGetStringi(GL_EXTENSIONS, i);
checkGlError("glGetStringi(GL_EXTENSIONS, i)");
if (strlen(extension) == 0) {
fprintf(stderr, "error: glGetStringi returned empty string\n");
exit(1);
}
if (strcmp(extension, debugExtensionString) == 0) {
hasDebugExtension3 = GL_TRUE;
}
}
if (hasDebugExtension != hasDebugExtension3) {
fprintf(stderr, "error: %s not consistently supported by GL3\n", debugExtensionString);
exit(1);
}
}
if (hasDebugExtension != glfwExtensionSupported(debugExtensionString)) {
fprintf(stderr, "error: %s not consistently supported by GLFW\n", debugExtensionString);
exit(1);
}
if (hasDebugExtension) {
switch (debugExtension) {
case KHR_DEBUG:
debugMessageInsert = khrDebugMessageInsert;
pushDebugGroup = khrPushDebugGroup;
popDebugGroup = khrPopDebugGroup;
objectLabel = glObjectLabel;
getObjectLabel = glGetObjectLabel;
break;
case ARB_DEBUG_OUTPUT:
debugMessageInsert = arbDebugMessageInsert;
break;
case AMD_DEBUG_OUTPUT:
debugMessageInsert = amdDebugMessageInsert;
break;
case EXT_DEBUG_MARKER:
debugMessageInsert = extDebugMessageInsert;
pushDebugGroup = extPushDebugGroup;
popDebugGroup = extPopDebugGroup;
break;
}
} else {
fprintf(stderr, "warning: %s not supported\n", debugExtensionString);
#ifdef __APPLE__
if (debugExtension == KHR_DEBUG && glfwExtensionSupported("GL_EXT_debug_label")) {
// glretrace will fallback to EXT_debug_label internally
require = GL_FALSE;
}
#endif
if (require) {
exit(EXIT_SKIP);
}
}
debugMessageInsert(-1, __FUNCTION__);
pushDebugGroup(-1, __FUNCTION__);
glClearColor(0.3, 0.1, 0.3, 1.0);
popDebugGroup();
// texture label
GLuint texture = 0;
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
objectLabel(GL_TEXTURE, texture, -1, "texture");
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, 1, 1, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
// framebuffer color attachment label
GLuint framebuffer = 0;
glGenFramebuffers(1, &framebuffer);
glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, 0);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
}
int main()
{
GLFWwindow *window;
char *userptr = "userptr";
glfwSetErrorCallback(errorcb);
assert(glfwInit() == GL_TRUE);
assert(!strcmp(glfwGetVersionString(), "3.2.1 JS WebGL Emscripten"));
assert(glfwGetCurrentContext() == NULL);
{
int major, minor, rev;
glfwGetVersion(&major, &minor, &rev);
assert(major == 3);
assert(minor == 2);
assert(rev == 1);
}
{
int count, x, y, w, h;
GLFWmonitor **monitors = glfwGetMonitors(&count);
assert(count == 1);
for (int i = 0; i < count; ++i) {
assert(monitors[i] != NULL);
}
assert(glfwGetPrimaryMonitor() != NULL);
glfwGetMonitorPos(monitors[0], &x, &y);
glfwGetMonitorPhysicalSize(monitors[0], &w, &h);
assert(glfwGetMonitorName(monitors[0]) != NULL);
glfwSetMonitorCallback(monitcb);
// XXX: not implemented
// assert(glfwGetVideoModes(monitors[0], &count) != NULL);
// assert(glfwGetVideoMode(monitors[0]) != NULL);
// glfwSetGamma(monitors[0], 1.0f);
// assert(glfwGetGammaRamp(monitors[0]) != NULL);
// glfwSetGammaRamp(monitors[0], ramp);
}
{
int x, y, w, h;
glfwDefaultWindowHints();
glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);
window = glfwCreateWindow(640, 480, "glfw3.c", NULL, NULL);
assert(window != NULL);
glfwSetWindowPosCallback(window, wposicb);
glfwSetWindowSizeCallback(window, wsizecb);
glfwSetWindowCloseCallback(window, wcloscb);
glfwSetWindowRefreshCallback(window, wrfrscb);
glfwSetWindowFocusCallback(window, wfocucb);
glfwSetWindowIconifyCallback(window, wiconcb);
glfwSetFramebufferSizeCallback(window, wfsizcb);
assert(glfwWindowShouldClose(window) == 0);
glfwSetWindowShouldClose(window, 1);
assert(glfwWindowShouldClose(window) == 1);
glfwSetWindowTitle(window, "test");
glfwSetWindowTitle(window, "glfw3.c");
// XXX: not implemented
// glfwSetWindowPos(window, 1, 1);
glfwGetWindowPos(window, &x, &y); // stub
glfwGetWindowSize(window, &w, &h);
assert(w == 640 && h == 480);
glfwSetWindowSize(window, 1, 1);
glfwGetWindowSize(window, &w, &h);
assert(w == 1 && h == 1);
glfwSetWindowSize(window, 640, 480);
glfwGetFramebufferSize(window, &w, &h);
// XXX: not implemented
// glfwIconifyWindow(window);
// glfwRestoreWindow(window);
// glfwShowWindow(window);
// glfwHideWindow(window);
assert(glfwGetWindowMonitor(window) == NULL);
glfwDestroyWindow(window);
window = glfwCreateWindow(640, 480, "glfw3.c", glfwGetPrimaryMonitor(), NULL);
assert(window != NULL);
assert(glfwGetWindowMonitor(window) == glfwGetPrimaryMonitor());
glfwDestroyWindow(window);
window = glfwCreateWindow(640, 480, "glfw3.c", NULL, NULL);
assert(window != NULL);
assert(glfwGetWindowAttrib(window, GLFW_CLIENT_API) == GLFW_OPENGL_ES_API);
assert(glfwGetWindowUserPointer(window) == NULL);
glfwSetWindowUserPointer(window, userptr);
assert(glfwGetWindowUserPointer(window) == userptr);
}
{
double x, y;
glfwSetKeyCallback(window, wkeypcb);
glfwSetCharCallback(window, wcharcb);
glfwSetMouseButtonCallback(window, wmbutcb);
glfwSetCursorPosCallback(window, wcurpcb);
glfwSetCursorEnterCallback(window, wcurecb);
glfwSetScrollCallback(window, wscrocb);
// XXX: stub, events come immediatly
// glfwPollEvents();
// glfwWaitEvents();
assert(glfwGetInputMode(window, GLFW_CURSOR) == GLFW_CURSOR_NORMAL);
// XXX: not implemented
// glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
glfwGetKey(window, GLFW_KEY_A);
glfwGetMouseButton(window, 0);
glfwGetCursorPos(window, &x, &y);
// XXX: not implemented
// glfwSetCursorPos(window, 0, 0);
}
{
// XXX: not implemented
// glfwJoystickPresent(joy);
// glfwGetJoystickAxes(joy, &count);
// glfwGetJoystickButtons(joy, &count);
// glfwGetJoystickName(joy);
}
{
// XXX: not implemented
// glfwSetClipboardString(window, "string");
// glfwGetClipboardString(window);
}
{
glfwGetTime();
glfwSetTime(0);
}
{
glfwMakeContextCurrent(window); // stub
assert(glfwGetCurrentContext() == window);
glfwSwapBuffers(window); // stub
glfwSwapInterval(0); // stub
}
{
assert(glfwExtensionSupported("nonexistant") == 0);
assert(glfwGetProcAddress("nonexistant") == NULL);
}
glfwTerminate();
#ifdef REPORT_RESULT
REPORT_RESULT(1);
#endif
return 0;
}
void PullInfo(){
printf("================================================================================\n");
int major, minor, rev;
glfwGetVersion(&major, &minor, &rev);
printf("GLFW version is %i.%i.%i\n", major, minor, rev);
int width, height;
glfwGetWindowSize(&width, &height);
printf("Window size is %i %i\n", width, height);
int status = glfwGetKey(GLFW_KEY_LCTRL);
if(status == GLFW_PRESS)
printf("Left control is pressed\n");
else
printf("Left control is released\n");
status = glfwGetMouseButton(GLFW_MOUSE_BUTTON_1);
if(status == GLFW_PRESS)
printf("Mouse button 1 is pressed\n");
else
printf("Mouse button 1 is released\n");
int x, y;
glfwGetMousePos(&x, &y);
printf("Mouse position is %i %i\n", x, y);
int wheel = glfwGetMouseWheel();
printf("Mouse wheel pos is %i\n", wheel);
double time = glfwGetTime();
printf("Time is %f\n", time);
glfwGetGLVersion(&major, &minor, &rev);
printf("GL version is %i.%i.%i\n", major, minor, rev);
int proc = glfwGetNumberOfProcessors();
printf("%i processors are available\n", proc);
unsigned int i;
for(i = 0; i<nb_params; i++)
printf(" - %-27s : %i\n", GetParamName(params[i]), glfwGetWindowParam(params[i]));
const char* extension = "MOZ_WEBGL_compressed_texture_s3tc";
printf("'%s' extension is %s.\n", extension, glfwExtensionSupported(extension) ? "supported" : "not supported");
extension = "GL_EXT_framebuffer_object";
printf("'%s' extension is %s.\n", extension, glfwExtensionSupported(extension) ? "supported" : "not supported");
extension = "glBindBuffer";
void* proc_addr = glfwGetProcAddress(extension);
printf("'%s' extension proc address is %p.\n", extension, proc_addr);
printf("Sleeping 1 sec...\n");
glfwSleep(1);
printf("...Done.\n");
printf("================================================================================\n");
#ifdef REPORT_RESULT
int result = 1;
REPORT_RESULT();
#endif
}
int main(int argc, char **argv)
#endif
{
const GLFWvidmode *video_mode;
int c;
while ((c = fz_getopt(argc, argv, "p:r:W:H:S:U:X")) != -1)
{
switch (c)
{
default:
usage(argv[0]);
break;
case 'p':
password = fz_optarg;
break;
case 'r':
currentzoom = fz_atof(fz_optarg);
break;
case 'W':
layout_w = fz_atof(fz_optarg);
break;
case 'H':
layout_h = fz_atof(fz_optarg);
break;
case 'S':
layout_em = fz_atof(fz_optarg);
break;
case 'U':
layout_css = fz_optarg;
break;
case 'X':
layout_use_doc_css = 0;
break;
}
}
if (fz_optind < argc)
{
fz_strlcpy(filename, argv[fz_optind], sizeof filename);
}
else
{
#ifdef _WIN32
win_install();
if (!win_open_file(filename, sizeof filename))
exit(0);
#else
usage(argv[0]);
#endif
}
title = strrchr(filename, '/');
if (!title)
title = strrchr(filename, '\\');
if (title)
++title;
else
title = filename;
memset(&ui, 0, sizeof ui);
search_input.p = search_input.text;
search_input.q = search_input.p;
search_input.end = search_input.p;
glfwSetErrorCallback(on_error);
if (!glfwInit()) {
fprintf(stderr, "cannot initialize glfw\n");
exit(1);
}
video_mode = glfwGetVideoMode(glfwGetPrimaryMonitor());
screen_w = video_mode->width;
screen_h = video_mode->height;
window = glfwCreateWindow(DEFAULT_WINDOW_W, DEFAULT_WINDOW_H, filename, NULL, NULL);
if (!window) {
fprintf(stderr, "cannot create glfw window\n");
exit(1);
}
glfwMakeContextCurrent(window);
ctx = fz_new_context(NULL, NULL, 0);
fz_register_document_handlers(ctx);
if (layout_css)
{
fz_buffer *buf = fz_read_file(ctx, layout_css);
fz_set_user_css(ctx, fz_string_from_buffer(ctx, buf));
fz_drop_buffer(ctx, buf);
}
fz_set_use_document_css(ctx, layout_use_doc_css);
has_ARB_texture_non_power_of_two = glfwExtensionSupported("GL_ARB_texture_non_power_of_two");
if (!has_ARB_texture_non_power_of_two)
fz_warn(ctx, "OpenGL implementation does not support non-power of two texture sizes");
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_texture_size);
ui.fontsize = DEFAULT_UI_FONTSIZE;
ui.baseline = DEFAULT_UI_BASELINE;
ui.lineheight = DEFAULT_UI_LINEHEIGHT;
ui_init_fonts(ctx, ui.fontsize);
reload();
shrinkwrap();
glfwSetFramebufferSizeCallback(window, on_reshape);
glfwSetCursorPosCallback(window, on_mouse_motion);
glfwSetMouseButtonCallback(window, on_mouse_button);
glfwSetScrollCallback(window, on_scroll);
glfwSetCharModsCallback(window, on_char);
glfwSetKeyCallback(window, on_key);
glfwSetWindowRefreshCallback(window, on_display);
glfwGetFramebufferSize(window, &window_w, &window_h);
ui_needs_update = 1;
while (!glfwWindowShouldClose(window))
{
glfwWaitEvents();
if (ui_needs_update)
run_main_loop();
}
ui_finish_fonts(ctx);
fz_drop_link(ctx, links);
fz_drop_page(ctx, page);
fz_drop_outline(ctx, outline);
fz_drop_document(ctx, doc);
fz_drop_context(ctx);
glfwTerminate();
return 0;
}
static void
testBufferStorage(void)
{
if (!GLAD_GL_VERSION_4_4 &&
!glfwExtensionSupported("GL_ARB_buffer_storage")) {
fprintf(stderr, "error: GL_ARB_buffer_storage not supported\n");
glfwTerminate();
exit(EXIT_SKIP);
}
GLbitfield map_trace_explicit_bit = 0;
if (glfwExtensionSupported("GL_VMWX_map_buffer_debug")) {
glNotifyMappedBufferRangeVMWX = (PFNGLNOTIFYMAPPEDBUFFERRANGEVMWXPROC)glfwGetProcAddress("glNotifyMappedBufferRangeVMWX");
assert(glNotifyMappedBufferRangeVMWX);
map_trace_explicit_bit = GL_MAP_NOTIFY_EXPLICIT_BIT_VMWX;
}
GLuint buffer = 0;
glGenBuffers(1, &buffer);
glBindBuffer(target, buffer);
GLsizeiptr size = 1000;
void *data = malloc(size);
memset(data, 0, size);
while ((glGetError() != GL_NO_ERROR))
;
glBufferStorage(target, size, data,
GL_MAP_WRITE_BIT |
GL_MAP_PERSISTENT_BIT |
GL_MAP_COHERENT_BIT |
map_trace_explicit_bit);
free(data);
GLenum error = glGetError();
switch (error) {
case GL_NO_ERROR:
break;
case GL_OUT_OF_MEMORY:
exit(EXIT_SKIP);
default:
exit(EXIT_FAILURE);
}
GLubyte *map;
// straightforward mapping
map = (GLubyte *)glMapBufferRange(target, 100, 100, GL_MAP_WRITE_BIT);
memset(map, 1, 100);
glUnmapBuffer(target);
// persistent mapping w/ explicit flush
map = (GLubyte *)glMapBufferRange(target, 200, 300, GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | GL_MAP_FLUSH_EXPLICIT_BIT);
memset(map + 20, 2, 30);
glFlushMappedBufferRange(target, 20, 30);
memset(map + 50, 3, 50);
glFlushMappedBufferRange(target, 50, 50);
glUnmapBuffer(target);
// persistent & coherent mapping
map = (GLubyte *)glMapBufferRange(target, 500, 100, GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | GL_MAP_COHERENT_BIT | map_trace_explicit_bit);
memset(map + 20, 4, 30);
glNotifyMappedBufferRangeVMWX(map + 20, 30);
memset(map + 50, 5, 50);
glNotifyMappedBufferRangeVMWX(map + 50, 50);
glUnmapBuffer(target);
glBindBuffer(target, 0);
glDeleteBuffers(1, &buffer);
}
void InitWindow()
{
const int width = GetConfigInt("window.width", 640);
const int height = GetConfigInt("window.height", 480);
const char* title = GetConfigString("window.title", "Konstrukt");
const bool debug = GetConfigBool("opengl.debug", false);
const bool vsync = GetConfigBool("opengl.vsync", true);
LogInfo("Compiled with GLFW %d.%d.%d",
GLFW_VERSION_MAJOR,
GLFW_VERSION_MINOR,
GLFW_VERSION_REVISION);
LogInfo("Using GLFW %s", glfwGetVersionString());
assert(g_Window == NULL);
glfwSetErrorCallback(OnGLFWError);
if(!glfwInit())
FatalError("GLFW init failed.");
glfwDefaultWindowHints();
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_DEPTH_BITS, GetConfigInt("opengl.depth-bits", 24));
glfwWindowHint(GLFW_STENCIL_BITS, 0);
glfwWindowHint(GLFW_SAMPLES, GetConfigInt("opengl.samples", 0));
glfwWindowHint(GLFW_SRGB_CAPABLE, GL_TRUE);
glfwWindowHint(GLFW_OPENGL_DEBUG_CONTEXT, debug ? GL_TRUE : GL_FALSE);
g_Window = glfwCreateWindow(width, height, title, NULL, NULL);
if(!g_Window)
FatalError("Window creation failed.");
glfwGetWindowSize(g_Window, &g_WindowWidth, &g_WindowHeight);
glfwGetFramebufferSize(g_Window, &g_FramebufferWidth, &g_FramebufferHeight);
glfwMakeContextCurrent(g_Window);
if(!flextInit(g_Window))
FatalError("Failed to load OpenGL extensions.");
LogInfo("Using OpenGL %s\n"
"Vendor: %s\n"
"Renderer: %s\n"
"GLSL: %s",
glGetString(GL_VERSION),
glGetString(GL_VENDOR),
glGetString(GL_RENDERER),
glGetString(GL_SHADING_LANGUAGE_VERSION));
if(vsync)
{
if(glfwExtensionSupported("GLX_EXT_swap_control_tear") ||
glfwExtensionSupported("WGL_EXT_swap_control_tear"))
glfwSwapInterval(-1); // enable vsync (allow the driver to swap even if a frame arrives a little bit late)
else
glfwSwapInterval(1); // enable vsync
}
else
{
glfwSwapInterval(0); // disable vsync
}
glfwSetInputMode(g_Window, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
glfwSetInputMode(g_Window, GLFW_STICKY_KEYS, GL_FALSE);
glfwSetInputMode(g_Window, GLFW_STICKY_MOUSE_BUTTONS, GL_FALSE);
if(debug)
{
if(!FLEXT_ARB_debug_output)
FatalError("Debug output requested, but it's not supported!");
glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
glDebugMessageCallbackARB(OnDebugEvent, NULL);
LogInfo("Debug output supported! You may receive debug messages from your OpenGL driver.");
}
glfwSetWindowSizeCallback(g_Window, OnWindowResize);
glfwSetFramebufferSizeCallback(g_Window, OnFramebufferResize);
glfwSetMouseButtonCallback(g_Window, OnMouseButtonAction);
glfwSetScrollCallback(g_Window, OnMouseScroll);
glfwSetCursorPosCallback(g_Window, OnCursorMove);
glfwSetKeyCallback(g_Window, OnKeyAction);
}
int main(int argc, char** argv)
{
int ch, samples = 4;
GLFWwindow* window;
while ((ch = getopt(argc, argv, "hs:")) != -1)
{
switch (ch)
{
case 'h':
usage();
exit(EXIT_SUCCESS);
case 's':
samples = atoi(optarg);
break;
default:
usage();
exit(EXIT_FAILURE);
}
}
glfwSetErrorCallback(error_callback);
if (!glfwInit())
exit(EXIT_FAILURE);
if (samples)
printf("Requesting MSAA with %i samples\n", samples);
else
printf("Requesting that MSAA not be available\n");
glfwWindowHint(GLFW_SAMPLES, samples);
glfwWindowHint(GLFW_VISIBLE, GL_FALSE);
window = glfwCreateWindow(800, 400, "Aliasing Detector", NULL, NULL);
if (!window)
{
glfwTerminate();
exit(EXIT_FAILURE);
}
glfwSetKeyCallback(window, key_callback);
glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
glfwMakeContextCurrent(window);
glfwSwapInterval(1);
if (!glfwExtensionSupported("GL_ARB_multisample"))
{
printf("GL_ARB_multisample extension not supported\n");
glfwTerminate();
exit(EXIT_FAILURE);
}
glfwShowWindow(window);
glGetIntegerv(GL_SAMPLES_ARB, &samples);
if (samples)
printf("Context reports MSAA is available with %i samples\n", samples);
else
printf("Context reports MSAA is unavailable\n");
glMatrixMode(GL_PROJECTION);
glOrtho(0.f, 1.f, 0.f, 0.5f, 0.f, 1.f);
glMatrixMode(GL_MODELVIEW);
while (!glfwWindowShouldClose(window))
{
GLfloat time = (GLfloat) glfwGetTime();
glClear(GL_COLOR_BUFFER_BIT);
glLoadIdentity();
glTranslatef(0.25f, 0.25f, 0.f);
glRotatef(time, 0.f, 0.f, 1.f);
glDisable(GL_MULTISAMPLE_ARB);
glRectf(-0.15f, -0.15f, 0.15f, 0.15f);
glLoadIdentity();
glTranslatef(0.75f, 0.25f, 0.f);
glRotatef(time, 0.f, 0.f, 1.f);
glEnable(GL_MULTISAMPLE_ARB);
glRectf(-0.15f, -0.15f, 0.15f, 0.15f);
glfwSwapBuffers(window);
glfwPollEvents();
}
glfwTerminate();
exit(EXIT_SUCCESS);
}
int main( int argc, char **argv )
{
int i, frames, benchmark;
double t0, t;
GLFWthread physics_thread = 0;
// Use multithreading by default, but don't benchmark
multithreading = 1;
benchmark = 0;
// Check command line arguments
for( i = 1; i < argc; i ++ )
{
// Use benchmarking?
if( strcmp( argv[i], "-b" ) == 0 )
{
benchmark = 1;
}
// Force multithreading off?
else if( strcmp( argv[i], "-s" ) == 0 )
{
multithreading = 0;
}
// With a Finder launch on Mac OS X we get a bogus -psn_0_46268417
// kind of argument (actual numbers vary). Ignore it.
else if( strncmp( argv[i], "-psn_", 5) == 0 );
// Usage
else
{
if( strcmp( argv[i], "-?" ) != 0 )
{
printf( "Unknonwn option %s\n\n", argv[ i ] );
}
printf( "Usage: %s [options]\n", argv[ 0 ] );
printf( "\n");
printf( "Options:\n" );
printf( " -b Benchmark (run program for 60 s)\n" );
printf( " -s Run program as single thread (default is to use two threads)\n" );
printf( " -? Display this text\n" );
printf( "\n");
printf( "Program runtime controls:\n" );
printf( " w Toggle wireframe mode\n" );
printf( " ESC Exit program\n" );
exit( 0 );
}
}
// Initialize GLFW
if( !glfwInit() )
{
fprintf( stderr, "Failed to initialize GLFW\n" );
exit( EXIT_FAILURE );
}
// Open OpenGL fullscreen window
if( !glfwOpenWindow( WIDTH, HEIGHT, 5,6,5,0, 16,0, GLFW_FULLSCREEN ) )
{
fprintf( stderr, "Failed to open GLFW window\n" );
glfwTerminate();
exit( EXIT_FAILURE );
}
// Set window title
glfwSetWindowTitle( "Particle engine" );
// Disable VSync (we want to get as high FPS as possible!)
glfwSwapInterval( 0 );
// Window resize callback function
glfwSetWindowSizeCallback( Resize );
// Set keyboard input callback function
glfwSetKeyCallback( KeyFun );
// Upload particle texture
glGenTextures( 1, &particle_tex_id );
glBindTexture( GL_TEXTURE_2D, particle_tex_id );
glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexImage2D( GL_TEXTURE_2D, 0, GL_LUMINANCE, P_TEX_WIDTH, P_TEX_HEIGHT,
0, GL_LUMINANCE, GL_UNSIGNED_BYTE, particle_texture );
// Upload floor texture
glGenTextures( 1, &floor_tex_id );
glBindTexture( GL_TEXTURE_2D, floor_tex_id );
glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexImage2D( GL_TEXTURE_2D, 0, GL_LUMINANCE, F_TEX_WIDTH, F_TEX_HEIGHT,
0, GL_LUMINANCE, GL_UNSIGNED_BYTE, floor_texture );
// Check if we have GL_EXT_separate_specular_color, and if so use it
if( glfwExtensionSupported( "GL_EXT_separate_specular_color" ) )
{
glLightModeli( GL_LIGHT_MODEL_COLOR_CONTROL_EXT,
GL_SEPARATE_SPECULAR_COLOR_EXT );
}
// Set filled polygon mode as default (not wireframe)
glPolygonMode( GL_FRONT_AND_BACK, GL_FILL );
wireframe = 0;
// Clear particle system
for( i = 0; i < MAX_PARTICLES; i ++ )
{
particles[ i ].active = 0;
}
min_age = 0.0f;
// Set "running" flag
running = 1;
// Set initial times
thread_sync.t = 0.0;
thread_sync.dt = 0.001f;
// Init threading
if( multithreading )
{
thread_sync.p_frame = 0;
thread_sync.d_frame = 0;
thread_sync.particles_lock = glfwCreateMutex();
thread_sync.p_done = glfwCreateCond();
thread_sync.d_done = glfwCreateCond();
physics_thread = glfwCreateThread( PhysicsThreadFun, NULL );
}
// Main loop
t0 = glfwGetTime();
frames = 0;
while( running )
{
// Get frame time
t = glfwGetTime() - t0;
// Draw...
Draw( t );
// Swap buffers
glfwSwapBuffers();
// Check if window was closed
running = running && glfwGetWindowParam( GLFW_OPENED );
// Increase frame count
frames ++;
// End of benchmark?
if( benchmark && t >= 60.0 )
{
running = 0;
}
}
t = glfwGetTime() - t0;
// Wait for particle physics thread to die
if( multithreading )
{
glfwWaitThread( physics_thread, GLFW_WAIT );
}
// Display profiling information
printf( "%d frames in %.2f seconds = %.1f FPS", frames, t,
(double)frames / t );
printf( " (multithreading %s)\n", multithreading ? "on" : "off" );
// Terminate OpenGL
glfwTerminate();
exit( EXIT_SUCCESS );
}
